Prosthetic tissue valve



FIG. 1 is a perspective view of my design for a prosthetic tissue valve;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a front elevational view thereof; and,

FIG. 5 is a top elevational view thereof. 

CLAIM I claim the ornamental design for a prosthetic tissue valve, as shown and described. 